Lakhimpur is an administrative district in the state of Assam in India. The district headquarters are located at North Lakhimpur.Lakhimpur figures largely in the annals of Assam as the region where successive invaders from the east first reached the Brahmaputra. The Baro Bhuyans, originally from the western provinces of India, were driven out by the Sutiya (a Shan race), and these in their turn gave place to their more powerful brethren, the Ahoms in the 13th century. The Burmese, who had ruined the native kingdoms, at the end of the 18th century, were in 1826 expelled by the British under the Treaty of Yandaboo. They placed the southern part of the state, together with Sivasagar under the rule of Raja Purandhar Singh; but it was not till 1838 that the whole was taken under direct British administration.